M-22 Eviscerator is a Shotgun. It is an effective weapon in close range where it deals large damage. They also come with a slow fire rate.

M-22 Eviscerator - Description

The Lieberschaft 2180 shotgun, or "Eviscerator," is of human civilian design and has a unique ammunition generator. Where most modern firearms shave off chips or pellets from an ammunition block, the M-22 shaves off serrated metal wedges designed to fly aerodynamically. This dramatically improves its armor-piercing capabilities, and its tight grouping helps wound ballistics at longer ranges than standard shotguns. This design also violates several intergalactic weapons treaties, so the M-22 is not distributed to militaries. 

M-22 Eviscerator - Can be used by

• Jack
• Jacob
• Grunt
• Tali

M-22 Eviscerator - How to obtain

• Obtained via Cerberus Weapon and Armor DLC
• Research through Normandy Tech Lab. The price is 2500 Iridium.

M-22 Eviscerator - Notes

• This weapon is unique in that it retains the same damage when shooting through long distances. However, its accuracy is still low.